| 1955 г. |
Founded of FSUE "VNIIFTRI", providing optical astronomical observations, combination of the results of USSR astronomical observatories observations for Universal Time evaluation, issue of SSTF bulletins "Standard time for average moments of radio signals transfer";
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| 1972 г. |
First Bulletin G with announcement about added leap second in National Universal Time Coordinated Scale UTC(SU); |
| 1975 г. |
Start of issue of SSTF quarterly bulletins E "Universal Time"; |
| 1976 г. |
Start of evaluation terrestrial pole coordinates from optic astronomical observation and issue of weekly SSTF Bulletins A "Universal Time and pole coordinates"; |
| 1985 г. |
Start of issue of SSTF quarterly bulletins E "Universal Time and pole coordinates" (the numbering started from the one following the number of the last bulletin E "Universal Time" number); |
| 1987 г. |
Start of using of GLONASS orbits radio control data for length of day variations and terrestrial pole coordinates evaluations in MMC SSTF; |
| 1987 г. |
Start of using of satellite Doppler measurements of signals of geodesy satellite GEO-IK for length of day variations and terrestrial pole coordinates evaluations in MMC SSTF; |
| 1994 г. |
Start of providing satellite laser ranging observations in MMC SSTF; |
| 1995 г. |
Start of using SLR observations of passive geodesy satellites Lageos-1 and Lageos-2 for length of day variations and terrestrial pole coordinates evaluations in MMC SSTF; |
| 1998 г. |
Start of providing of GPS observations on ROSSTANDART metrological control sites; 1999 г. – Start of the operative evaluation of length of day variations and terrestrial pole coordinates from GPS phase data processing in MMC SSTF; |
| 2001 г. |
Start of providing of GPS/GLONASS observations on ROSSTANDART metrological control sites; |
| 2004 г. |
Start of evaluation all EOP from VLBI data processing in MMC SSTF; |
| 2006 г. |
Start daily combination of VLBI, GNSS and SLR data and start of issue operative (rapid) SSTF Bulletins Q; |
| 2011 г. |
Finish of optic astronomical observation using for purposes of EOP evaluation in MMC SSTF due to the start of operation in service mode of the Russian VLBI net KVASAR-KVO. |
| 2012 г. |
Start of operation of SLR systems "Sazhen-TM", located in MMC SSTF (Mendeleevo) and East-Siberian Branch of FSUE "VNIIFTRI" (Irkutsk). |
| 2015 г. |
Resuming of operative processing SLR data for evaluation of terrestrial pole coordinates in MMC SSTF and including its results in SSTF Bulletins E; |
| 2017 г. |
Start evaluation of Universal Time from LLR data processing in MMC SSTF; |
| 2018 г. |
Start of observations on next generation of the "Tochka"-type laser station. Start of combination of VLBI, GNSS and SLR data on the observational (normal equations) level. |
| 2019 г. |
Start of using the delay observations on VGOS stations of Russian VLBI net KVASAR-KVO, developed by IAA RAS for Universal Time evaluation purpose. |
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pvz@vniiftri.ru